Business bio-waste: from cost to resource
For a hotel, a restaurant, a supermarket or a food manufacturer, bio-waste is usually the heaviest and most difficult waste stream: kitchen scraps, expired products, production by-products, green waste from gardens. Most of it still ends up in the mixed waste bin. That means cost, odours, more frequent collection and a resource that is lost.
In our article on separate bio-waste collection for municipalities we looked at the local government side. Here we focus on businesses: what the rules are, where the cost is hidden and how bio-waste becomes a resource.
What applies to businesses
Greek Law 4819/2021 (Article 50, as in force) sets specific obligations for bio-waste:
Food service businesses, regardless of size: must ensure separate collection of their bio-waste, with bins of sufficient capacity, once their municipality has started separate collection.
Large producers, from 1.1.2023: category A or B food processing plants, wholesale fruit and vegetable markets, category A supermarkets and main hotels with more than 100 beds. They must arrange for the collection and transport of their bio-waste through companies registered in the Electronic Waste Register (HMA) or in cooperation with the municipality.
Inspections may be carried out by environmental inspectors, municipal services, the Ministry of Rural Development and the Hellenic Food Authority (EFET). In addition, the revised Waste Framework Directive sets binding European targets for reducing food waste by 2030: 10% in processing and manufacturing, and 30% per capita in retail, food service and households. Businesses in the sector will increasingly be asked to show what they are doing.
Where the cost is hidden
The cost of bio-waste does not appear on a single line of the balance sheet. It is spread out:
Food that was bought and thrown away. This is usually the largest cost, far larger than the cost of waste management.
Collection and disposal. Bio-waste is heavy and increases the volume and frequency of mixed waste collection.
Labour hours spent preparing food that was not served or products that were not sold.
Hygiene and odours, especially in summer, affecting the customer experience.
The hierarchy: from prevention to recovery
The circular approach follows a clear order of priority. The higher up the ladder, the greater the benefit:
Level What it means in practice
1. Prevention Right orders, portions, storage and demand forecasting. The bio-waste that is never produced is the cheapest.
2. Donation Safe surplus food is offered to food banks and social services.
3. By-product use Processing by-products become raw material for other sectors, where the law allows.
4. Composting A soil improver is produced, which can even return to the business’s own gardens.
5. Anaerobic digestion Biogas and energy production in suitable plants.
Last resort: landfill The resource is lost and methane is produced.
Note: catering and kitchen waste counts as an animal by-product (Regulation (EC) 1069/2009) and must not be used as animal feed. The solution chosen must always comply with the law and the terms of the environmental permit.
What it means for each sector
Sector Main bio-waste Biggest opportunity
Hotels Buffets, kitchen preparation, garden green waste Buffet design, composting of green and kitchen waste
Food service Preparation, plate waste, oils Portion size, menu, separate collection
Supermarkets Fruit, vegetables, expired products Demand forecasting, near-expiry discounts, donations
Food industry Peels, stones, production rejects, sludge By-product use, stabilisation, biogas
Practical steps for the business
Measure. Weigh your bio-waste for one to two weeks, by source: preparation, plates, storage, garden. Without measurement you don’t know where to act.
Prevent. Based on the data, adjust orders, portions, storage and menus.
Separate at source. Brown bins in the right places, clear signage and staff training. Clean separation determines the quality of the final product.
Find the right partner. A collection company registered in the HMA, the municipality or a bio-waste treatment plant in your area.
Record and communicate. Report correctly in the HMA, track your indicators and use the results in ESG reporting and in communication with customers. Measuring circularity under ISO 59020 provides a credible framework.
A hypothetical example
A hotel produces 120 tonnes of waste a year. 45 tonnes of this is bio-waste that currently goes into the mixed bin.
With better buffet planning, bio-waste falls by 15%, i.e. around 7 tonnes less food is bought and thrown away.
Of the remaining 38 tonnes, 34 are collected separately and sent for composting.
Mixed waste falls from 120 to around 79 tonnes, i.e. by a third, with fewer collections and fewer odours.
The hotel now has measurable results to show tour operators, certification schemes and customers who ask for evidence-based sustainability data.
The figures are indicative. Actual results depend on the type of business and the infrastructure in the area.
GREENWISE’s experience
GREENWISE combines environmental permitting, management systems and expertise in bio-waste treatment, with European patents in bio-waste stabilisation. We help businesses find the solution that fits their own scale: from the first measurement to cooperation with treatment plants.
Want to see what bio-waste really costs you?
We start with a short review of your waste streams and propose practical, compliant and cost-effective solutions.
Book a meeting
See also: Waste Management & Local Planning · Environmental Permitting · Bio-waste: a guide for municipalities
This article is for information only and does not replace legal or technical advice for your specific business. Obligations depend on the provisions in force and the environmental permit of each facility.
